The assembly can be integrated inside a 3D-printed case for added protection. Cells and microbubbles are pushed through the device using a syringe pump or a peristaltic pump connected to PVC tubing. Enhanced delivery of biomolecules to human T cells and lung cancer cells is demonstrated with this acoustofluidic system. Compared to bulk treatment approaches, this acoustofluidic system increases throughput and reduces variability, which can improve cell processing methods for biomedical research applications and manufacturing of cell-based therapeutics.Colorectal cancers are characterized by heterogeneity and a hierarchical organization comprising a population of cancer stem cells (CSCs) responsible for tumor development, maintenance, and resistance to drugs. A better understanding of CSC properties for their specific targeting is, therefore, a pre-requisite for effective therapy. However, there is a paucity of suitable preclinical models for in-depth investigations. Although in vitro two-dimensional (2D) cancer cell lines provide valuable insights into tumor biology, they do not replicate the phenotypic and genetic tumor heterogeneity. In contrast, three-dimensional (3D) models address and reproduce near-physiological cancer complexity and cell heterogeneity. The aim of this work was to design a robust and reproducible 3D culture system to study CSC biology. The present methodology describes the development and optimization of conditions to generate 3D spheroids, which are homogenous in size, from Caco2 colon adenocarcinoma cells, a model that can be used for long-term culture. https://www.selleckchem.com/products/AG14361.html Importantly, within the spheroids, the cells which were organized around lumen-like structures, were characterized by differential cell proliferation patterns and by the presence of CSCs expressing a panel of markers. These results provide the first proof-of-concept for the appropriateness of this 3D approach to study cell heterogeneity and CSC biology, including the response to chemotherapy.The purpose of the presented protocols is to determine the domain of Au(III) binding in BSA. The BSA-Au(III) compound exhibits ultraviolet (UV)-excitable red luminescence (λem = 640 nm), with unusual Stokes shifts compared to the innate UV/blue fluorescence arising from the aromatic residues. Red-luminescent complexes are formed in highly alkaline conditions above pH 10 and require a conformation change within the protein to occur. In addition, preservation of Cys-Cys disulfide bonds in BSA is necessary to obtain this red luminescence. In order to understand the mechanism of this luminescence, elucidation of the luminophore-forming Au(III) binding site is essential. A facile way to assess the luminophore-forming site would be to (1) predictably fragment the protein by enzymatic digestion, (2) react the obtained fragments with Au(III), then (3) perform gel electrophoresis to observe the well-separated fragment bands and analyze the in-gel red luminescence. However, due to the alkaline conditions and the reaction with metal cations, new limited proteolysis techniques and gel electrophoresis conditions must be applied. Particularly, the presence of metal cations in gel electrophoresis can make the band separations technically difficult. We describe this new protocol in steps to identify the red-luminophore-forming metal binding domain in BSA. This protocol can thus be applied for analyzing protein fragments that must remain in a non-denatured or a partially denatured state, in the presence of metal cations. Because the majority of proteins need metal cations to function, analyses of metal-bound proteins are often desired, which have relied on x-ray crystallography in the literature. This method, on the other hand, could be used in supplement to study the interactions of proteins with metal cations without requiring the protein crystallization and at a desired pH condition.Modern approaches in quantitative live cell imaging have become an essential tool for exploring cell biology, by enabling the use of statistics and computational modeling to classify and compare biological processes. Although cell culture model systems are great for high content imaging, high throughput studies of cell morphology suggest that ex vivo cultures are limited in recapitulating the morphological complexity found in cells within living organisms. As such, there is a need for a scalable high throughput model system to image living cells within an intact organism. Described here is a protocol for using a high content image analyzer to simultaneously acquire multiple time-lapse videos of embryonic Drosophila melanogaster development during the syncytial blastoderm stage. The syncytial blastoderm has traditionally served as a great in vivo model for imaging biological events; however, obtaining a significant number of experimental replicates for quantitative and high-throughput approaches has been labor intensive and limited by the imaging of a single embryo per experimental repeat. Presented here is a method to adapt imaging and microinjection approaches to suit a high content imaging system, or any inverted microscope capable of automated multipoint acquisition. This approach enables the simultaneous acquisition of 6-12 embryos, depending on desired acquisition factors, within a single imaging session.The morphology, size and quantity of cells, starch granules and protein bodies in seed determine the weight and quality of seed. They are significantly different among different regions of seed. In order to view the morphologies of cells, starch granules and protein bodies clearly, and quantitatively analyze their morphology parameters accurately, the whole-seed-sized section is needed. Though the whole-seed-sized paraffin section can investigate the accumulation of storage materials in seeds, it is very difficult to quantitatively analyze the morphology parameters of cells and storage materials due to the low resolution of the thick section. The thin resin section has high resolution, but the routine resin sectioning method is not suitable to prepare the whole-seed-sized section of mature seeds with a large volume and high starch content. In this study, we present a simple dry sectioning method for preparing the whole-seed-sized resin section. The technique can prepare the cross and longitudinal whole-seed-sized sections of developing, mature, germinated, and cooked seeds embedded in LR White resin, even for large seeds with high starch content.